The rubber feet on the bottom of the PS4 slim are shaped like the controller buttons : r/mildlyinteresting
Main Engine Housing Case For Sony PS4 Pro/ Slim Protective Front Bottom Shell Cover for Sony PlayStation 4 Slim Game host Parts
3pcs Protective Front Bottom Shell For Sony Ps4 Slim Main Engine Housing Case For Playstation 4 Pro/slim Game Host Cover Parts - Accessories - AliExpress
Getting ready to move, and I noticed on the bottom of my PS4 pro, the rubber feet are the buttons from the controller. I love finding little details like that. : r/playstation
Amazon.com: New Replacement Top Upper & Bottom Cover Full Housing Shell Case Cover for PS4 Slim Console Black : Video Games
Just bought a PS4 Pro. The rubber grips on the underside are the buttons of the controller. I enjoy the little details like this - 9GAG
JMXLDS New Replacement Top Upper & Bottom Lower Housing Shell Case Cover Protective Cover for PS4 Pro Console White : Amazon.co.uk: PC & Video Games
PlayStation 4 Slim Bottom Cover Replacement - iFixit Repair Guide